← Back to search

Meaning of air sac | Babel Free

Noun CEFR B2

Definitions

An alveolus.
An extension of a lung of some birds.

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

air sandwich air scooter Air Scout Air Scouting air scribe Air Sea Rescue